JP2002187716A - Method of manufacturing salt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of manufacturing salt efficiently and in a large quantity without stripping minerals and a method of offering natural salt from sea water at a low cost. SOLUTION: The method of manufacturing salt is performed by providing a plurality of evaporation ponds arranged stepwise and provided with valves respectively communicated with, a sea water intake port communicated with the evaporation pond in the upper most stage, a tank communicated with the lower most evaporation pond and for temporarily storing salt water concentrated in the evaporation ponds, a structure for filtering and purifying the salt water, a heating system for heating the salt water to crystallize to form a crystallized form and a system for further removing the water in the salt being in crystallized state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing an alkaline salt using natural seawater.

[0002]

2. Description of the Related Art In general, rock salt is produced in large amounts in natural salt,
It is also dissolved in salt lakes and salt wells. It has been widely practiced in foreign countries to excavate this rock salt and then inject water to dissolve it and pump it up as salt water, or to boil it and recover it as re-produced salt. In the case of salt lakes, salt water is crystallized in the sun to produce salt. In addition, since seawater contains a salt content of nearly 3%, salt is produced by the solar salt method when seawater is used as a raw material. . The general method of solar salt production is to make salt by evaporating seawater with sunlight, create a shallow pond whose bottom is solidified with clay, and sequentially move seawater concentrated with sunlight from one side. Finally, it is a method of making salt crystals as a product in a crystal pond.

[0003] However, this method is not suitable for mass production and has drawbacks in that labor costs are increased. Therefore, a method of producing salt by condensing seawater by heating with fire has been used. In such a method, a seawater concentration of about 1 to 2 ゜ has to be evaporated to 25 ゜ using gas or oil. Because of this, there was a problem that energy wasted wasted.

[0004]

Technical problems to be solved by the present invention are as follows: magnesium, potassium, fluorine, iron, sulfur,
Given that seawater natural salts rich in minerals such as calcium have been reviewed and the demand for them is ever increasing, they can be provided efficiently, mass-produced, and inexpensively without escaping these minerals. It is to propose a method that can be done.

[0005]

That is, the main feature of the present invention is that seawater evaporation ponds (1A) to (1A).
N) is provided stepwise. Then, the seawater is guided to the uppermost evaporating pond (1A), exposed to the sun for a certain period of time and raised to a certain concentration, and then moved to the next evaporating pond (1B), and simultaneously to the empty evaporating pond (1A). Put fresh seawater,
After a certain period, the brine of the evaporation pond (1B) is sequentially transferred to the next evaporation pond, and when reaching the final evaporation pond (1N), the concentration of the brine is set to approximately 25 degrees. Therefore, the work was very efficient for mass production.

Another feature of the present invention is that the concentrated brine is temporarily stored in a tank, and then the brine is heated to be in a crystalline state. That is, the production period can be remarkably shortened as compared with that of the present invention, and an excellent salt that does not allow mineral components to escape can be provided.

Another feature of the present invention is that the salt body in the crystalline state is further calcined to obtain a rich flavor.
That is, a salt rich in minerals was obtained. The present invention has many other excellent features, functions, and evaluations, which will be clarified by the embodiments and the effects described below.

[0008]

Embodiment 1 In describing an embodiment of the present invention, first, an apparatus and a structure used in the method of the present invention will be described. In the embodiment, (1A) to (1N) denote a plurality of steps provided in steps. It is an evaporation pond. (2) is seawater, (3) is a breakwater, and (4) is a seawater intake provided at, for example, an upper part of the breakwater and always closed by a valve (6) such as a wooden plug. When the valve (6) of the inlet (4) is opened, the seawater flows from the inlet (4) through the uppermost evaporating pond (1A).
Is to fall.

[0009] Also, (5A) to (5N) are communication passages that communicate with each of the plurality of evaporation ponds (1A) to (1N), and each of the communication passages (5A) and (5N) has a wooden plug. Such valves (6A) to (6N) are provided.
Further, (7) is a storage tank connected to the communication passage (5N) provided in one of the lower evaporating ponds (1N), (8) is a filtration chamber, (9) is a purification chamber, and (10) is a purification tank. Heating room,
(11) is a removal chamber for removing water again. In FIG. 2, (12) is a baking chamber of a system for baking the salt body after passing through a system for further removing water from the salt body in a crystalline state, but this baking chamber (12) is not provided. Even so, the effects of the present invention can be achieved. Also, (1
3) is a product packaging system, and (14) is a finished product shipping warehouse.

[0010]

[Effects] The evaporation ponds (1A), (1B), (1)
It is assumed that N) has no seawater and is “empty”. Here, the valve (6) such as a wooden plug is pulled out, and the seawater (2) is introduced into the evaporation pond (1A). At this time, the concentration of seawater is 1 ° to 2 °. After that, the seawater is exposed to the sun for a certain period of time, and when the concentration reaches a certain
A) is opened and moved to the second evaporation pond (1B) via the communication path (5A), and fresh seawater is poured into the empty evaporation pond (1A). In this way, the seawater is gradually transferred to the evaporation pond (1N) in a stepwise manner so that the seawater can be produced very efficiently with high concentration (about 25 °) of brine.

At this time, the plurality of evaporation ponds (1A)
When the synthetic resin sheet (15) such as vinyl chloride is laid on the entire inner wall of (1N) to (1N), the absorption of heat by sunlight in the evaporation ponds (1A) to (1N) is promoted. As compared with the case where the synthetic resin sheet (15) such as vinyl chloride is not laid, the period for increasing the concentration can be significantly shortened, and the evaporation ponds (1A) to (1N) are made of clay or the like. In comparison with the former, there was no danger that the minerals contained in the seawater would escape into the soil. Subsequently, the brine is stored in a storage tank (7). Once a certain amount of brine is stored, the filtration room (8)
After filtration in the purification and purification chamber (9), the heating chamber (10)
Heat with. Further, by removing the remaining water in the removal chamber (11), a natural seawater salt rich in minerals which does not impair the round flavor was obtained. In FIG. 2, reference numeral (12) denotes a firing chamber which is heated in the heating chamber (10) of the above embodiment and then fired after the step of removing water in the removal chamber (11). Although not an essential requirement, the flavor of the produced salt can be enhanced.

[0012]

As described above, the present invention further improves the structure of a plurality of evaporation ponds for exposing the seawater to natural fire when producing natural seawater salt. By arranging, compared with the conventional evaporating pond, the evaporating action of seawater can be greatly promoted, and construction can be made easily and inexpensively.

[0013] In general, the effect of the present invention is a method for producing a salt in which seawater is concentrated using a plurality of evaporation ponds and natural minerals are preserved as they are, and the salt is produced using natural seawater. Thereby, an alkaline salt having an excellent PH concentration can be produced in large quantities.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing a manufacturing process according to one embodiment of the present invention.

FIG. 2 is a schematic block diagram of another embodiment.

[Explanation of symbols]

 1A-1N, evaporating pond 2, seawater 3, breakwater 4, seawater intake 5A-5N, communication passage 6A-6N, valve 7, storage tank 8, filtration room 9, purification room 10, heating room 11, removal room 12 , Firing room 13, packaging system 14, shipping warehouse 15, synthetic resin sheet such as vinyl chloride

Claims (2)

[Claims] 1. A plurality of evaporation ponds (1A) provided in a stepwise manner.
To (1N), and valves (6A) to (6N) communicating the respective evaporating ponds (1A) to (1N), and the seawater is guided to the first evaporating pond (1A) at the uppermost stage for a certain period of time. Exposing the sun to a certain concentration, transferring the brine having reached the certain concentration to a second evaporating pond (1B), introducing new seawater into the first evaporating pond; A process of sequentially shifting to an evaporating pond one after another for each period to make the concentration in the lowermost evaporating pond (1N) approximately 25 degrees; a process of temporarily storing the concentrated brine in a tank; A process for heating to a crystalline state. 2. A method for producing a salt, comprising a step of further firing the salt body in a crystalline state.